摘要
超材料作为一种新型拓扑优化设计的结构材料,展现出特殊的物理性质,比如负泊松比、负折射率等,在波动控制和隐身方面有重要的潜在应用价值,因此受到国内外的广泛关注。增材制造技术,又称为3D打印技术,适合于制造复杂形状的结构,利用增材制造技术制造隐身超材料具有较高的几何自由度和尺寸精度,为超材料的广泛应用提供技术条件。本文基于超材料的基本概念,对隐身超材料结构设计、功能调控的研究进展进行详细介绍,进一步介绍增材制造隐身超材料的光固化法、熔融沉积法、激光选区烧结/熔化法等工艺方法,并讨论了增材制造超材料在制造过程中存在的阶梯效应、原材料黏附现象、热扩散现象、尺寸精度、粗糙度等问题。
As a novel structural material proposed by topology optimization, metamaterials present unusual properties, such as negative Poisson’s ratio, negative indexofrefraction and so on. Metamaterials have potential application in the aspect of wave controlling and stealth. Therefore, it has aroused great interests in the world. Additive manufacturing technology, also called 3D printing technology, is suitable to make structures with complicated geometries. It is a high geometric freedom to fabricate stealth metamaterials via additive manufacturing technology, which provides technical support for the wide applications. The design of structure and the theory of stealth are both mentioned based on the basic theory of metamaterial. Moreover, a variety of additive manufacturing processes for the preparation of stealth metamaterials, such as light curing method, fusion deposition method, laser selective sintering / melting method are described in detail in the present paper. Problems, for instance, the staircase effect, raw material adhesion, thermal diffusivity, dimensional accuracy and roughness occurred in the fabrication of additive manufacturingmetamaterials are discussed in order to provide references for the follow-up researchers.
作者
张磊
卓林蓉
汤桂平
宋波
史玉升
ZHANG Lei;ZHUO Linrong;TANG Guiping;SONG Bo;SHI Yusheng(State Key Laboratory of Materials Processing and Die ＆ Mould Technology, Huazhong University of Science and Technology,Wuhan 430074, Chin)
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2018年第3期10-19,共10页
Journal of Aeronautical Materials
基金
国家自然科学基金面上项目(51775208)
关键词
超材料
结构设计
增材制造
隐身功能
metamaterial
structural design
additive manufacturing
stealth function
